公开(公告)号：US20240204671A1

公开(公告)日：2024-06-20

申请号：US18590329

申请日：2024-02-28

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Pei-Hsin LIU ,  Richard Lee VALLEY ,  Bharath Balaji KANNAN

IPC: H02M3/335 ,  G06F1/26 ,  G06F13/42 ,  H02M1/00 ,  H02M1/08 ,  H05B45/37

CPC classification number: H02M3/33523 ,  G06F1/266 ,  G06F13/4282 ,  H02M1/08 ,  H05B45/37 ,  G06F2213/0042 ,  H02M1/0009 ,  H02M1/0032

Abstract: A circuit includes a transistor having a first current terminal, a second current terminal, and a control terminal; and a current sense circuit coupled to the second current terminal. The circuit also includes modulation circuitry coupled to the control terminal and to the current sense circuit and a mode controller coupled to the modulation circuitry.

公开(公告)号：US20220190730A1

公开(公告)日：2022-06-16

申请号：US17686376

申请日：2022-03-03

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Pei-Hsin LIU ,  Richard Lee VALLEY ,  Bharath Balaji KANNAN

IPC: H02M3/335 ,  H02M1/08 ,  G06F1/26 ,  G06F13/42 ,  H05B45/37

Abstract: A system includes an isolated converter having a power transformer with a primary winding, a secondary winding, and an auxiliary winding. The system also includes: 1) a first switch coupled to the primary winding; 2) a switch controller coupled to the first switch; and 3) a bias power regulator circuit coupled to the auxiliary winding and the switch controller. The bias power regulator circuit includes a second switch. The bias power regulator circuit is configured to provide a bias supply output voltage to the switch controller based on a first set of modes that modulate a switching frequency of the second switch and based on a second mode in which the second switch stays off.